Firstly I must say that I am very impressed with the new USB stack. I installed build #r20674-090410 on my sansa e270 When I plugged it in it worked just as well as the sansa firmware. It charged it and file transfer worked flawlessly at full speed. I do have 1 question though. Can this firmware be used to write to a micro sdhc card in the sansa or do you still need to use a card reader. I am thinking of picking up and 8gb chip so a response would be helpful.